FX6 question

[Cichlidkid]

My fx 6 is starting to push out lots of tiny air bubbles the last couple of days. After it purges everything is good for a couple of hours but then it starts back up again. I obviously know I have a problem somewhere but what are the common areas to start. I checked hose clamps, and fitting, I am thinking the impeller is causing cavitation but I dont here any sounds from that area. Any help would be greatly appreciated especially if you had this issue.

[superrob750]

do you have a airstone near the intake?

[Cichlidkid]

No air stones in the tank period.

[Maize-N-Blue-D]

Check the water level of the tank,  in the directions it states that the intake and outlet must be a certain level below the water line. You might be pulling in air from either if the water level is low.